/* 第一件事：css编码集：“utf8”加载成utf-8*/
@charset "utf-8";
/* 效果：所有的div画圆  300*300 文本垂直居中放大
         所有圆加不同颜色
*/
div{
	float: left;
}
.d1{
	width: 300px;
	height: 300px;
	border: 1px solid red;
	border-radius: 50%;
	text-align: center;
	font-size: 50px;
	line-height: 300px;
	background-color: red;
}
.d2{
	width: 300px;
	height: 300px;
	border: 1px solid red;
	border-radius: 50%;
	text-align: center;
	font-size: 50px;
	line-height: 300px;
	background-color: blue;
}
.d3{
	width: 300px;
	height: 300px;
	border: 1px solid red;
	border-radius: 50%;
	text-align: center;
	font-size: 50px;
	line-height: 300px;
	background-color: yellow;
}
.d4{
	width: 300px;
	height: 300px;
	border: 1px solid red;
	border-radius: 50%;
	text-align: center;
	font-size: 50px;
	line-height: 300px;
	background-color: orange;
	clear: left;
	margin-left: 77%;
	margin-top: -26%;
}	